When you try to access the Archive Manager Web site, you will see the banner flickering. The web site will stay in this state without producing an error but fail to load properly.
This can be caused by two things
The SQL Server Service is not running or the SQL Server is down
The username and password used for the Identity on the Archive Manager Application Pool is incorrect
For reason 1:
Ensure that the SQL Server Service is running and that SQL is accepting connections
For reason 2:
In IIS 6.0 navigate to the Archive Manager Application Pool. Click on the Identity Tab and ensure that the username and password are correct.